[R] Constant Error in R
David Winsemius
dwinsemius at comcast.net
Wed Oct 10 02:43:19 CEST 2012
On Oct 9, 2012, at 2:30 PM, bobo wrote:
> Hi good R folks,
>
> I am hoping that you could help me resolve this issue. I tried finding
> answers online but to no avail.
>
> I keep getting this "Error in x^2 : non-numeric argument to binary operator"
> using multiple different codes, ones which have been verified to work by my
> professor and other students.
>
> I tried reinstalling R completely and it still didn't fix the issue.
>
> I am using the latest version and Mac 10.8.2.
>
> Thank you!
>
> I am posting the code where the error occurred below:
>
> library(foreign)
> library(lmtest)
> library(car)
>
> x.1 <- runif(1000,0,1)
>
> x.2 <- rbinom(1000,1,.5)
>
> b.1 <- 10
> b.2 <- 2
>
> mu <- 1+(x.1*b.1) + (x.2*b.2)
>
> Z <- cbind(x.1)
>
> gamma <- 10
>
> sigma2 <- exp(2+Z*gamma)
>
> y <- mu +rnorm(1000) * sqrt(sigma2)
>
> lm.y<-lm(y~x.1+x.2)
>
> "Error in x^2 : non-numeric argument to binary operator"
Well, something is strange here. Your error message is stating that the interpreter was unable to find x^2, but you have no x^2 expression in your code. I ran the code (except for the library calls which were clearly not needed for those commands. No error. I then loaded the packages and re-ran the code. Again, no errors.
>
> summary(lm.y)
You probably need to restart R with the --vanilla option or if you are using a GUI, locate and rename the .Rdata file and then restart. If the error persist, you should post sessionInfo() results.
--
David Winsemius, MD
Alameda, CA, USA
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